Motivated by recent experimental results we reconsider semileptonic D → P ℓν ℓ decays within a model which combines heavy quark symmetry and properties of the chiral Lagrangian. We include all observed charm meson resonances in our Lagrangian and determine their impact on the charm meson semileptonic form factor F+. We find that the inclusion of recently discovered charm resonances in the model...

Recent results on the hadroproduction of charm and beauty are discussed in the context of the current theoretical and experimental status. The areas covered include production of open charm and beauty particles and charm and beauty quarkonia. Experimental results from both fixed target and colliding beam experiments are presented and compared to theoretical predictions. Predictions based on QCD...

The way a charm-quark fragments into a charmed hadron is a challenging problem both for the theoretical and the experimental particle physics. Moreover, in neutrino induced charmproduction, peculiar processes occur such as quasi-elastic and diffractive charm-production which make the results from other experiments not directly comparable. We present here a method to extract the charmed fraction...

The recently obtained strong evidence for D − D̄ oscillations from the B factories provides an important benchmark in our search for New Physics in charm transitions. While the theoretical verdict on the observed values of xD and yD is ambiguous – they could be fully generated by SM dynamics, yet could contain also a sizable contribution from New Physics – such oscillations provide a new stage f...

From covariant transport theory, a significant ∼ 10% light quark elliptic flow at RHIC implies an elliptic flow of similar magnitude for charm quarks, at moderately large pT > 2.5 − 3 GeV. At lower transverse momenta, charm quark elliptic flow reduces progressively, reminiscent of the mass ordering pattern in ideal hydrodynamics. From the quark flows we predict the elliptic flow of D mesons at ...

Motivated by recent experimental results we reconsider semileptonic D → P ℓν ℓ decays within a model which combines heavy quark symmetry and properties of the chiral Lagrangian. We include all observed charm meson resonances in our Lagrangian and determine their impact on the charm meson semileptonic form factors. We find that the inclusion of recently discovered charm resonances in the model l...

We study effects of the intrinsic charm on the hadronic production of Ξcc at SELEX, Tevatron and LHC. By taking the intrinsic charm into account, the cross-section of the production at SELEX is changed significantly. In contrast, at LHC and Tevatron the change is small because the gluon-gluon fusion becomes dominant. The measured cross-section at SELEX is much larger than the prediction based o...

We explore the possibility that the excess neutral and charged current events seen by the H1 and ZEUS Collaborations at HERA at large x and Q2 could arise from a hard charm component of the nucleon. While the symmetric intrinsic charm hypothesis is unable to account for the HERA anomaly, a non-symmetric charm distribution generated non-perturbatively, for which c is much harder than c, can prod...